This tale is only a rumor that a drunken man has spread in bars and it slowly became widespread. He tells this tale because one day he was walking to the bar and a note from an adventurer named Kaelin was swept up by the wind and hit him in the face.
The note reads:
This note is a document of what I have found in a mountanous region around the Sea of Serpents. I was adveturing for the Fountain of Youth said to be hidden along the coast. I was tipped off by an agent of the king of my land. It was said to be false but my personality would not allow that concept unless I found it. I have passed by a valley that is hidden (then it continues on the back of the paper) in a deep fog and almost completly surrounded by mountains. I will venture through the fog may my faith keep me safe. (then the writing begins to fade slowly) I have found the city containing the Fountain of Youth. Although I have found it there seems to be monks here that are of holy religion but seem eerie to me.
(then in very small writing at the bottom right corner it says)
The drunken man ran into the bar and told everyone that if they buy him a drink he will tell them of the tale of the Fountain of Youth and show proof. Most didn’t believe the man at first but soon enough a young lad bought him a drink. The drunken man kept his promise and showed the lad the note and told the tale as if he went with Kaelin himself. The young boy could barely sit next to the man and listen due to the excessive stentch of his breath and underarms. The boy however did not leave and barely cared for the tale intrigued him to venture for the Fountain of Youth. The boy told everybody, and the man has been in the same bar for 3 years drinking away and starting bar fights with any man that attempts to steal the note from him.
There have been many concepts to this and many rumors of the city they call The City of Venerability which contains the Fountain of Youth.
~Your PCs walk into the local bar of a city and find the man telling the tale of the Fountain of Youth. They possibly overhear him and want to hear it themselves. They could kill him for it, steal it, or simply buy him a shot of whiskey.
~They hear a person in a city telling the tale of the drunken man and his rumors that he spread about the City of Venerability.
A great way to throw your PCs into a twist or sidetrack them into a side quest or even give them something to look for and they could possibly never find. They could also find it and find out the real reason why nobody returns.
Look at inset below for explaination of theories about the city.